LED lighting apparatus having improved color lendering and LED filament
US11527682B2 · kind B2 · utility
1Cited by
3References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2019 |
| Grant date | Dec 13, 2022 |
| Priority date | — |
| Expiry date | Jul 24, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/831
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lighting apparatus including at least one light emitting diode (LED) chip configured to emit blue light; a green phosphor having a light emission peak in a range of 500 nm to 550 nm; and a red phosphor having a light emission peak in a range of 600 nm to 650 nm, in which the red phosphor includes a first red phosphor having a light emission peak in a range of 620 nm to 630 nm and a second red phosphor having a light emission peak in a range of 630 nm to 640 nm, and the full widths at half maximum of the first and second red phosphors are in a range of 20 nm to 60 nm, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.